4- Anyone who's ever played with an Erector Set knows
that as long as the structural members remain well-connected, a framework may
become twisted and distorted if it falls to the floor, but it will never just
collapse into pieces under any scenario involving self-related and self-proportional
forces.

In post
4, shaman_ argued that an erector set weighing a few hundred grams isn't
the same thing as the tallest buildings in the world. I agree that it's a bit
different. David Ray Griffin has this to say about the issue of scale:
*************************************
If one could somehow create an exact scaled replica of one of the Towers, complete
with multi-story miniature steel core columns with their steel beam framing
and cross-bracing, high-strength interconnected steel perimeter columns, the
floor system with its steel pans and trusses, and all of the other steel framing,
welds and bolted connections, it would be much STRONGER than any conceivable
Erector Set structure of similar height and proportions.
*************************************
http://www.truememes.com/mackey.html